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Controlling Palladium Nanocrystals by Solvent-Induced Strategy for Efficient Multiple Liquid Fuels Electrooxidation
Ying Zhang1, Xing Zhu2, Jun Guo2
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, Jiangsu, China.
ACS Applied Materials & Interfaces
|July 22, 2016
Summary
Researchers developed a new method to create palladium nanocatalysts with tunable shapes, enhancing their stability and activity for electrocatalytic oxidation of liquid fuels. This advancement is crucial for developing efficient fuel cell technologies.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Palladium (Pd) is a potential economical alternative to platinum (Pt) for catalyzing liquid fuel electrooxidation.
- Limited stability and activity of current Pd nanocatalysts hinder fuel cell development.
Purpose of the Study:
- To develop a novel solvent-induced procedure for synthesizing dimension-controlled palladium nanocrystals (Pd NCs).
- To investigate the impact of morphology on the electrocatalytic performance of Pd NCs for liquid fuel oxidation.
Main Methods:
- Utilized molybdenum carbonyl (Mo(CO)6) to ensure the {111} facet exposure in Pd NCs.
- Controlled reduction kinetics using different solvents (1-methyl-2-pyrrolidone, formamide, acetylacetonate) to tune Pd NC morphology (nanosheets, tetrapods, concave tetrahedra).
Main Results:
- Successfully synthesized distinct Pd NCs with tunable geometries.
- Demonstrated shape-dependent electrocatalytic activity for ethylene glycol, glycerol, ethanol, and methanol oxidation.
- Pd nanosheets exhibited superior activity and stability compared to other Pd morphologies, commercial Pd/C, and Pd black.
Conclusions:
- Solvent choice is a key factor in controlling Pd NC dimensions and optimizing electrocatalytic performance.
- This work provides a new strategy for designing high-performance Pd nanocatalysts for liquid fuel electrooxidation in fuel cells.
